Friction member



F b, l7,v 1925.

J. W. WATSON FRICTION MEMBER Filed Nov. 12, 1920 Patented Feb. 17, 1925.

PATENT OFFICE.

JOHN WARREN WATSON, or PHILADELPHIA, PENNsYLvANm.

FRICTION MEMBER.

Application filed November 12, 1920. Serial No. 423,726.

T 0 all whom it may concern .7

Be it known that 1, JOHN WARREN VVAT- soN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented a Friction Member, of which the following is a specification. 7

It has been noted that in devices such as friction clutches," friction brakes, snubbers, shock absorbers and the like, in which the frictional engagement of two members tends to prevent or retard their relative movement, a vibratory condition is set up which is particularly noticeable at the beginning'of or doing slow relative movement of said mem bers, with the result that there is produced a noise and a chattering or alternate engagement and disengagement, which may be highly objectionable.

One object of m invention therefore is to provide means or preventing the noise and vibratory or chattering action noted, and more specifically to provide a friction memher which shall cooperate with its associated member or structure in such manner that there is neitherv noise nor chattering produced when said parts are relatively moved, even after they have remained immovably in engagement for some time.

A further object of the invention is to provide a friction member with means for applying to its working surface as well as to the surface of its coo crating friction member, a thin film of ubricant, which while sufficient to prevent such vibratory conditions as would roduce noise or alternate engagement an disengagement, shall not materially interfere with the proper functioning of said member as a friction holding or producing element in the combination in which it is employed.

It is further desired to rovide a novel form of friction member, w 'ch in addition to including means for supplyin a thin film of lubricant to the surface whic it engages aswell as to its own surface, shall also 1n-' elude means for absorbing and retaining any surplus lubricant which may be supplie so that excess of the latter shall be avoided and a reservoir be provided from which the lubricant may be later delivered as required.

These objects and other advantageous ends I attain as hereinafter set forth, reference bein had to the accompanying drawing, in w 'ieh,

Fig. 1 is a perspective view, partly in section, illustrating a friction member equipped with one form of my invention.

In the. above drawing, 1 represents a portion of a band, shoe, drum, or other structure forming one of a pair of coacting friction elements, of such material or composition that it tends to frictionally grip or retard the relative movement of the second element with which it cooperates.

Carried by this friction member are a series of bodies 2 of leather or equivalent material soaked in or impregnated with a lubricant such as neats-foot oil, eastorl oil, or the like, and these bodies in the present instance are shown as cylindrical pieces set in correspondingly formed holes in the member 1 with either or both of their flat ends projecting slightly beyond the face or faces ofsaid member.

Adjacent these lubricant-carrying mem here 2 I mount one or any desired number of wipers 3 in the form of bodies of felt or equivalent material designed to absorb and hold surplus or waste lubricant escaping from or provided by the bodies 2.

It is to be understood that under operating conditions only sufiicient lubricant is supplied by or delivered from. the leather bodies 2 as Wlll form an exceedingly thin film upon thesurface' of their supporting friction element as well as over the surface of its coacting element, and while this film acts to prevent or materially reduce static friction between the two members, it does not appreciably affect their desired fries tional cooperation for the purpose of retarding or preventing their relative movement. In other words, while a predetermined force is required to move said elements relatively to each other, they begin movement from a state of rest underthe action of said force without producing noise and without chattering and alsoare capable of continuing in slow relative movement under'the same conditions.

The felt bodies act to absorb any slight surplus of lubricant which may be delivered from the leather bodies 2 and thus later serve as auxiliary sources of sup ly from which may also be delivered the lubricant nec ssary to obtain the objects above noted.

I claim:

1. The combination of a friction memher and at least one lubricant-impregnated body carried thereby for supplying a film of lubricant to the friction face of said member.

2. The con'lbination of a friction member; a body of absorbent material mounted therein; and a lubricant carried by said body.

3. lhe combination of a friction mem her; a body of absorbent material mounted therein; lubricating material carried by said body; with an absorbent Wiper also carried by the friction member.

l. The combination of a friction member having at least one body of lubricantimpregnated leather mounted therein.

The combination of a friction member having a series of lubricant impregnated bodies of leather mounted therein; With felt Wipers also mounted in said member.

6. The combination of a band of friction material; with at least one lubricant-impregnated body carried by said band and projecting slightly beyond the flat surface thereof.

7 The combination of a band of friction material; at least one lubricant impregnated body carried thereby, its surface projecting slightly beyond the flat surface of said band; and at least one absorptive wiper also carried by said band adjacent said body.

8. A lubricant impregnated friction in sert.

9. friction member comprising, a lubricant impregnated friction insert.

10. A friction member comprising a lubri cant impregnated insert.

11. A friction member comprising lubriant impregnated means for governing the friction qualities of said member.

12. A friction member comprisimg a lubricant impregnated insert for governing the friction qualities of said member.

JOHN WARREN XVATSON. 

